Perhaps through some instinct of which naught is known by human creatures, it felt the strange presence of a thing which roused it.

It stirred, at first drowsily, and lifted its head and sniffed; then it stretched its limbs, and having done so, stood up, turning on its mistress a troubled eye, and this she saw and stopped to meet it.

'Twas a strange look she bestowed upon it, a startled and fearful one; her thought drew the blood up to her cheek, but backward again it flowed when the little beast lifted its nose and gave a low but woeful howl.

Twice it did this, and then jumped down, and standing before the edge of the couch, stood there sniffing.
There was no mistake, some instinct of which it knew not the meaning had set it on, and it would not be thrust back.

In all beasts this strange thing has been remarked--that they know That which ends them all, and so revolt against it that they cannot be at rest so long as it is near them, but must roar, or whinny, or howl until 'tis out of the reach of their scent.